Leave it running while you get on with your life
Close the app, shut the laptop, go to sleep. Your phone keeps going: downloads finish, apps stay logged in, whatever you left running is still running when you come back. Nothing drains, nothing overheats, nothing needs charging.
Run several at once, side by side
One phone per account, per game, per client, per test. They run independently and none of them can see the others, so what happens on one stays on one. Add another whenever you need it and let it go when you do not.
Pick it up from anything with a screen
Open it and the phone is right there: tap, type, scroll, drag, rotate. Touch lands in well under a second, so it feels like a device in your hand rather than a video of one. Close the tab and it carries on without you.
Move things on and off it
Drop files onto the phone, pull them back, install an APK, grab a screenshot, share the clipboard. It behaves like a device you own, because for as long as you rent it, it is one.